IMHO spring hawks are good but very situational. Sometimes they can be very usefull, sometimes they are useless. Their main disadvantage is that they are extremely fragile. They also only have luighting type damage, and the enemy can make his commanders and troops totally immune against it.
Against big enemy Groups spring hawks die instantly. Against SC (or enemy commanders if they can get to them) they can be deadly, but only if SC is not protected from lighting, as many of them are, otherwise they are useless as well. It only take 5 air gems or 1 cheap air spell to make unlimited number of spring hawks irrelivent to SC, which is not hte case with summer lions.
Still I agree that the hawks are good, mostly because they are relatively cheap.
As for summer lions - I said myself that they are definetly not the best summons, and that they are expensive. But they are not the worst summons either, which is the topic of this thread in case you forgot.

They do require certain subtlety and preferably some support magic to be used most efficiently though. Besides - what are the better fire summons do you have at their levels? Firedrakes?
Mage with 5-10 summerlions can conquer most indep province even on high level with no problem and often no or little losses. And like I said the strong flank charge spearheaded by large group of summer lions can seal the fate of large battle, as I did myself several times.
Bottom line is - as far as low level fire summons goes summer lions are not too bad, though definetly expensive. And they are better than other similiar melee-types seasonal spirits, such as winter wolves and fall bears as well as any other fire-based summons of their level or below.
[ May 21, 2004, 05:08: Message edited by: Stormbinder ]